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an unpleasant emotion caused by the belief that someone or something is dangerous, likely to cause pain, or a threat:

«…への» 恐れ, 恐怖(感) «of» (!具体例ではa ～/～s; その際しばしば修飾語を伴う; terrorはfearよりかなり強い恐怖, horrorはぞっとする恐ろしさを示す; dreadは悪いことが起きるかもしれないという恐れ; → afraid)

e.g. he is prey to irrational fears

e.g. drivers are threatening to quit their jobs in fear after a cabby's murder

e.g. fear of increasing unemployment.

(fear for) a feeling of anxiety concerning the outcome of something or the safety and well-being of someone:

«…への» 心配 «for» (!具体例ではa ～; その際しばしば修飾語を伴う)

e.g. police launched a search for the family amid fears for their safety.

the likelihood of something unwelcome happening:

【よくないことが起こる】恐れ, 可能性 «of, that節, of doing»

e.g. she could observe the other guests without too much fear of attracting attention.

archaic a mixed feeling of dread and reverence:

(主に神への)畏れ

e.g. the love and fear of God.

be afraid of (someone or something) as likely to be dangerous, painful, or threatening:

〖fear A/to do/doing〗 A〈人･事･物〉が, …するのが怖い, 恐ろしい

e.g. with clause : farmers fear that they will lose business

e.g. he said he didn't care about life so why should he fear death?

no object (fear for) feel anxiety or apprehension on behalf of:

(危険ではないかと) 【人を】心配する, 気遣う; 【生命･安否などを】案じる, 危惧する «for»

e.g. I fear for the city with this madman let loose in it.

with infinitive avoid or put off doing something because one is afraid:

｟かたく｠〖fear to do/doing〗 (怖くて)…するのをためらう

e.g. they aim to make war so horrific that potential aggressors will fear to resort to it.

used to express regret or apology:

｟かたく｠ ; 〖～(that)節〗 残念ながら…ではないかと思う (!(1)be afraidよりかたい表現. (2)挿入節として文中や文尾にも用いられる)

e.g. I'll buy her book, though not, I fear, the hardback version.

archaic regard (God) with reverence and awe.

〈神など〉を畏れる

to avoid the risk of (or that): no one dared refuse the order for fear of losing their job.

used to reassure someone: we shall meet again, never fear.

cause someone to be very frightened.

impartially: make all your decisions without fear or favor.

Old English fǣr‘calamity, danger’, fǣran‘frighten’, also ‘revere’, of Germanic origin; related to Dutch gevaar and German Gefahr ‘danger’.